anonymous
  • anonymous
Which expression is equivalent to sin^2(π/2−x) over sinx? –sin x sin x cot x cos x cot x sin x tan x
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
|dw:1447451415819:dw|
freckles
  • freckles
you can use the cofunction identity
anonymous
  • anonymous
so it would be c?

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freckles
  • freckles
I haven't done the problem but you can show me your work and I can check it
anonymous
  • anonymous
because sin pi/2 -x= cos x?
freckles
  • freckles
right sin(pi/2-x)=cos(x) is a confunction identity square both sides you have sin^2(pi/2-x)=cos^2(x)
freckles
  • freckles
so you have cos^2(x)/sin(x) ..
freckles
  • freckles
which can be written as...
freckles
  • freckles
hint cos^2(x)=cos(x)*cos(x)
anonymous
  • anonymous
cos2(xcsc(x))?
freckles
  • freckles
himm... I don't know where that comes from... you should have \[\frac{\cos^2(x)}{\sin(x)}=\frac{\cos(x) \cdot \cos(x)}{\sin(x)}=\cos(x) \cdot \frac{\cos(x)}{\sin(x)}\]
freckles
  • freckles
cos(x)/sin(x) is also known as...
anonymous
  • anonymous
cotx so it would be c thank you so much for your help!
freckles
  • freckles
np

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